public void TestReplicaSetName()
{
var settings = new MongoServerSettings();
Assert.AreEqual(null, settings.ReplicaSetName);
var replicaSetName = "abc";
settings.ReplicaSetName = replicaSetName;
Assert.AreSame(replicaSetName, settings.ReplicaSetName);
settings.Freeze();
Assert.AreSame(replicaSetName, settings.ReplicaSetName);
Assert.Throws<InvalidOperationException>(() => { settings.ReplicaSetName = replicaSetName; });
}